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首页> 外文期刊>RSC Advances >Catalytic low-temperature combustion of dichloromethane over V-Ni/TiO2 catalyst
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Catalytic low-temperature combustion of dichloromethane over V-Ni/TiO2 catalyst

机译：在V-Ni / TiO2催化剂上催化低温燃烧二氯甲烷

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摘要

Vanadium-nickel mixed oxides supported on TiO2 (anatase) were prepared by wet impregnation using ammonium metavanadate and nickel nitrate aqueous solution. The performance of as-prepared samples in catalytic dichloromethane (DCM) combustion was investigated, and their physicochemical properties were characterized in detail by X-ray diffraction, N-2 physisorption, H-2 temperature-programmed reduction, NH3 temperature-programmed desorption, and Raman spectroscopy analyses. Results showed DCM combustion activity over V-Ni/TiO2 catalyst was superior to that of V2O5/TiO2 and NiO/TiO2 catalysts. DCM could be completely converted into CO2, HCl, and a little amount of CO over Ni-V/TiO2 catalyst at 350 degrees C, the toxic by-products, such as CH3Cl, aldehydes and phosgene could not be observed by online IR spectroscopy. The high catalytic activity, selectivity, and stability of V-Ni/TiO2 catalyst could be due to the good oxidative dehydrogenation ability (ODH), the good reducibility of active oxygen species, and suitable strength of Lewis acidic sites upon introduction of nickel oxide.
机译：使用含铵甲烷酸铵和硝酸镍水溶液，通过湿浸渍制备在TiO 2（锐钛矿）上负载的钒镍混合氧化物。研究了用催化二氯甲烷（DCM）燃烧中的制备样品的性能，并通过X射线衍射，N-2物理化，H-2温度编程，NH3温度编程解吸来详细表征它们的物理化学性质，和拉曼光谱分析。结果显示，V-Ni / TiO2催化剂上的DCM燃烧活性优于V2O5 / TiO2和NiO / TiO2催化剂的DCM燃烧活性。 DCM可以完全转化为CO 2，HCl，并在350℃下将少量CO，少量的CO-V / TiO 2催化剂，通过在线IR光谱不能观察到毒性副产物，例如CH3Cl，醛和光气。 V-Ni / TiO2催化剂的高催化活性，选择性和稳定性可能是由于良好的氧化脱氢能力（ODH），活性氧物质的良好还原性，以及在引入氧化镍后Lewis酸性位点的合适强度。

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  • 来源
    《RSC Advances》 |2015年第96期|共8页
  • 作者

    Zhang Xinhua; Pei Zhiying; Ning Xingjie; Lu Hanfeng; Huang Haifeng;

  • 作者单位

    Zhe Jiang Univ Technol Coll Biol &

    Environm Technol Hangzhou 310032 Zhejiang Peoples R China;

    Zhe Jiang Univ Technol Coll Biol &

    Environm Technol Hangzhou 310032 Zhejiang Peoples R China;

    Zhe Jiang Univ Technol Coll Biol &

    Environm Technol Hangzhou 310032 Zhejiang Peoples R China;

    Zhe Jiang Univ Technol Coll Chem Engn Hangzhou 310032 Zhejiang Peoples R China;

    Zhe Jiang Univ Technol Coll Biol &

    Environm Technol Hangzhou 310032 Zhejiang Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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